Malicious PDF — malware analysis report

Static analysis result for SHA-256 52f3ea1d4476b092…

MALICIOUS

PDF

68.9 KB Created: 2020-11-13 18:04:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e0c5f66cff8bef7ed5d0b445b768b4fc SHA-1: 75acb77b370ff89d827e74a3e164390443d2d166 SHA-256: 52f3ea1d4476b092f7b527a4b0ff81e3638335f3dd02218d66f078ff8240fe8e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The embedded URL is a critical indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and the malicious URL strongly suggest an attempt to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/strik?utm_term=war+on+carbs+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370540/normal_5fae8cd55c74e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f8c21c781969.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478398/normal_5fa83c697f1df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f89321d54628.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422890/normal_5fae8dfc925be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445890/normal_5f9cbaaeb7935.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496013/normal_5fac1897d855b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jifesu/7188630234.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/wupolatojinov.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/the_keto_diet_leanne_vogel.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/unity_reorderable_list_documentation.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/calculus_2_problems_with_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/pevopos.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/wajukaminexozexuw.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01F 5272 bytes
SHA-256: ad43f7924095eccf2bbe584158d8d7e8d7ecbc5741d64876d561ef49dc45112b
font_01_sfnt_off0000e223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE223 10928 bytes
SHA-256: cc5bb29aa4f6ab9b80ce86db6632f7b6d41e0a4245cf156b08f06bd430a213e2

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